Ripple formation on a particle bed sheared by a viscous liquid. Part 2. Oscillating flow

Ripple formation on a particle bed sheared by a viscous liquid. Part 2. Oscillating flow

A new model for the erosion and deposition of particles, developed in Part 1, is now applied to oscillating flows to give an analytic expression for the growth rate. We find that ripples can grow in oscillating flows when they do not in steady flows of the same magnitude, this being due to a suppres...

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Veröffentlicht in:Journal of fluid mechanics 2006-03, Vol.550 (1), p.123-137
Hauptverfasser: CHARRU, F., HINCH, E. J.
Format: Artikel
Sprache:eng
Schlagworte:
Earth sciences
Earth, ocean, space
Erosion rates
Exact sciences and technology
Geomorphology, landform evolution
Hydrology
Hydrology. Hydrogeology
Marine and continental quaternary
Steady flow
Surficial geology
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Zusammenfassung:A new model for the erosion and deposition of particles, developed in Part 1, is now applied to oscillating flows to give an analytic expression for the growth rate. We find that ripples can grow in oscillating flows when they do not in steady flows of the same magnitude, this being due to a suppression in rapidly oscillating flows of the erosion by higher shear rates on the crests.
ISSN:0022-1120
1469-7645
DOI:10.1017/S0022112005007871